IV91004: CRASH IN VIOENT_INIT_LS_TIMER WHEN POLL_UPLINK=YES 16/12/29 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• **************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 6100-09 Technology Level with
  * devices.vdevice.IBM.l-lan.rte at the 6.1.9.200 level.
  **************************************************************
  * PROBLEM DESCRIPTION:
  * On VIO client LPARs using virtual ethernet, if the
  * poll_uplink attribute is set to 'yes' for any virtual
  * ethernet adapter device, the system may crash during reboot
  * after updating to the affected Service Packs listed below.
  *
  * The device attribute can be verified with:
  * # lsattr -El entX -a poll_uplink
  *
  * Please apply the fixes below if updating to the affected
  * Service Packs, before rebooting, to avoid the crash
  * on boot.
  *
  * The crash will show information similar to:
  * Illegal Trap Instruction Interrupt in Kernel
  * vioent_init_ls_timer+000000 tdllti r31,200
  *
  * If this crash is experienced, the system can be recovered
  * by temporarily removing the virtual ethernet device(s) from
  * the LPAR profile and rebooting.  Then the attribute can be
  * unset and the system reactivated with the original profile.
  *
  * The device attribute can be changed with:
  * # chdev -l entX -a poll_uplink=no
  **************************************************************
  * RECOMMENDATION:
  * Install APAR IV91004.
  * Prior to fix availability, an interim fix is available from
  * either
  * ftp://aix.software.ibm.com/aix/ifixes/iv91004/
  * https://aix.software.ibm.com/aix/ifixes/iv91004/
  * Installation of the ifix requires a reboot.
  **************************************************************
  

Local fix

• If this crash is experienced, the system can be recovered
  by temporarily removing the virtual ethernet device(s) from
  the LPAR profile and rebooting.  Then the attribute can be
  unset  and the system reactivated with the original profile.
  .
  The device attribute can be changed with:
  # chdev -l entX -a poll_uplink=no
  

Problem summary

• A compiler option is used with the vioentdd driver to
  instrument a number of runtime checks.  These checks
  are hit regularly by vioent_init_ls_timer(), which is
  executed when poll_uplink=yes.
  

Problem conclusion

• For now remove the compiler option to avoid the asserts.
  

Temporary fix

•   *********
    * HIPER *
    *********
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IV91019 IV91020 IV91028 IV91029 U875424 U875427 U875430 U875436
  U875439

Fix information

• Fixed component name

  AIX 610 STD EDI

• Fixed component ID

  5765G6200

Applicable component levels

• R610 PSY U870044

     UP17/10/17 I 1000 «

PTF to Fileset Mapping

• U870044 devices.vdevice.IBM.l-lan.rte 6.1.9.300